pulsed analogue output

[Neil Fleet]

Hi All

 

I was wondering if someone could help me with a programming issue. I am relatively new to PLC programming and am struggling with how to send a one shot analogue output based on a digital input signal. Is it as simple as controlling a relay and running the analogue output through the volt free contact or can I do it in the PLC.

thanks in advance.

Neil

[Flex727]

I'm not sure "one shot analog output" really has any meaning. You will need to have a thorough understanding of the electronics involved (rise and fall times, etc). If you just need a certain voltage or current output for a short period of time, use the analog output or a relay attached to a digital output and run a timer in the PLC triggered by your input. There is a very convenient "Extended Pulse" timer you can use.